Automatic reversing mechanism



- (No M odel 2 Sheets-Sheet, 1 J. a. CRAWFORD. V M AUTOMATICREVERSING'MEGEANISMi No. 402,654. I Patented May 7, 1889.

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J. G CRAWFORD. AUTOMATIG REVERSING MEGHANISM.

" N0.,4OZ.,654. V Patented May 7,1889.

UNITED STATES PATENT OFFICE.

JAMES G. CRAWFORD, OF BOSTON, MASSACHUSETTS.

AUTOMATIC REVERSING MECHANISM.-

SPECIFICATION forming part of Letters Patent No. 402,654, dated May '7,1889.

I Application filed May 28, 1888. Serial No. 275,287. '(No model.)

To all whom it may concern.-

Be it known that I, JAMES G. CRAWFORD, of Boston, in the county ofSuifolk and State of Massachusetts, have invented certain new and usefulImprovements in Automatic Reversing Mechanism, of which the following isa specification.

' of the yielding latch or detent which holds bar.

the shipper-bar at the ends of its movement, said view showing also apart of the shipper- Figs. 5 and 6 represent a modification of means formoving the shipper-bar.

The same letters of reference indicate the same parts in all thefigures.

In the drawings, (it represents the fixed casing, containing the rotarycylinder of a washing-machine.

b I) represent the belts which transmit power to said cylinder from aprime motor, one of said belts being open and the other crossed, so thatone rotates the cylinder in one direction and the other in the oppositedirection.

a 0 represent loose pulleys mounted on a driving-shaft, e, which isjournaled in bear iugs in a frame, f, attached to the-end of casmg a.

01 represents a pulley affixed to said shaft between said loose pulleys.

To the driving-shaft e is affixed a gear, 9, Which meshes with a largergear, h, affixed to the driven shaft?) of the washer-cylinder. A worm,j, is formed on the hub of the loose pulley c, said worm meshing with aworm- Wheel, k, on a shaft, Z, which is journaled in a bearing on theframe f.

m represents the shipper bar, Which is adapted to slide in guides n n onthe frame f, and is provided with the usual guide rods or ,arms, 0 0',-which engage the belts b 6'. (See Figs. 1 and 3.)

p represents a guide-rod attached to the frame f and arranged parallelwith the shipper-bar. slot or groove, 0*, which receives a pin or stud,s, affixed eccentrically to a wheel or disk, 6. Said wheel is affixed toa shaft, it, which is journaled in a bearing on the frame J". On theshaft u is a sprocketwheel, e, which is connected by a sprocket-chain,w, with a sprocket-wheel, a, affixed to the shaft Z of the Worm-wheel7c.

The slide g has a pin, e, which projects into a slot, f, in a lever, g,said lever being pivoted at h to the shipper-bar. The belt I), whichdrives the loose pulley c, is of suliicient width to rotate said pulleywhen said belt is shipped onto the fast pulley d, so that the rotationof the loose pulley c is continuous and a continuous rotation isimparted therefrom to the shaft to and its disk 25 through the worm j,worm-wheel 7c, sprocket-wheels a o, and chain w. The rotation of thedisk 25 causes the pin 5 thereon to revolve and reciprocate the slide (1by its engagement with the slot 0 of said slide, the movement thusimparted to the slide being longer than the slot f of the lever g, sothat the stud 'e onthe slide, after making a part of its movement ineach direction, strikes an end of the slotf and moves the lever g andshipper-bar mwith it during the remainder of its movement. Theshipperbar is thus moved first in one and then in the oppositedirection, the movement given to it being sufficient to shift the beltsand reverse the rotation of the driven shaft 1' at each movement of theslide q. The lever g has a handle, g, by which it may be turned to theposition shown in dotted lines in Fig. l, and when it is in saidposition the slide q will reciprocate without moving the shipper-bar.

it represents a spring catch or detent at tached to the frame f andformed atits free end to spring into grooves Z Z in blocks at tached tothe shipper-bar. Said blocks are so arranged that when the shipper baris at one end of its movement the block Z will engage the cat-ch, andwhen the shipper-bar is at the opposite end of its movement the block Z"willengage said catch. The shipper-bar is thus held at each extreme ofits movement On said rod is a slide, q, having a' with suflicientfirmness to prevent its accidental displacement.

It will be seen that the described devices constitute a simple andeffective means for operating the shipper-bar at the desired intervals.

I have shown in Fig. 5 a modification in which the slide q and the leverg with its slot f are dispensed with, and the shipperbar is providedwith an enlargement having an endless slot which includes the are-shapedportions 2 3, having the same radius as the pin 8 and the straightvertical portions 4 5. Assuming the rotation of the disk t to be asindicated by the arrow in Fig. 5 and the shipper-bar to be in theposition shown in said figure, it will be seen that the portion 2 of theslot is parallel with the are in which the pin 8 moves, so that whilesaid pin is moving through the portion 2 it will have no eifect on theshipper-bar; but'when. the pin reaches the lower end of the portion 2and enters the vertical portion 4 it will, in passing through thelatter, move the shipper-bar to the position shown in Fig. 6, thusbringing the portion 3 into coincidence with the arc in which the pin 3moves, so that the shipper-bar remains at rest while the pin is passingthrough the portion 3 and until it enters the vertical portion 5, whenthe pin, acting on said portion 5, moves the shipper-bar in the oppositedirection to the position shown in Fig. 5. By this modification the samemovements are given to the shipper-bar as by the devices abovedescribed.

It will be seen that the rapidity of the reversing movements of theshipper-bar depends 011 the relative proportions of the sprocketwheels aand 1*; hence by increasing the relative size of the sproeketrwheel ctthe movements of the shipper-bar will be more frequent, and vice versa.

I claim 1. The combination of the driven shaft Z, the driving-shaft e,geared to the driven shaft, the fast pulley (Z and loose pulleys c c 011the driving-shaft, the worm j on the hub of the loose pulley c, theshaft Z, having the wormwheel 7c, meshing with said worm, thesprocket-wheel a on the shaft Z, the shaft u, having the sprocket-wheelo and the eccentric-pin s, the sprocket-chain w, connecting the wheels ar, the shipper-bar m, and means, as described, between the shipper-barand the cocentric-pin 5, whereby said bar is reciprocated by therevolutions of said pin, as set forth.

2. The combination of the driven shaft 1, the driving-shaft e, geared tothe driven shaft, the fast pulley d and loose pulleys cc on thedriving-shaft, the worm j on the hub of the loose pulley c, the shaft Z,having the wormwheel 70, meshing with said worm, the sprocket-Wheel a onthe shaft Z, the shaft u, having the sprocket-wheel 'v and theeccentric-pin s, the sprocket-chain w, connecting the wheels a o, theslide q, adapted to move on a fixed guide and provided with a slot, 1",receiving the pin 3, and with a stud or pin, 6, and the shipper-bar m,engaged, as described, with the stud or pin 6', as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 25th day of May, A.

JAMES G. CRAWFORD.

Vitnesses: 1

C. F. BROWN, A. D. HARRISON.

